HD64F2149YV datasheet(275/1075 Pages) RENESAS

275 / 1075 page

Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 247 of 1044

REJ09B0280-0300

Selection Method and Pin Functions

P95/

AS/IOS/CS1 The pin function is switched as shown below according to the combination of

operating mode, bit IOSE in SYSCR, bit HI12E in SYSCR2, and bit P95DDR.

Operating

mode

Mode 1,

modes 2 and 3

(EXPE = 1)

Modes 2, 3 (EXPE = 0)

HI12E

—

P95DDR

—

IOSE

———

Pin function

output pin

IOS

output pin

P95

input pin

P95

output pin

CS1

input pin

P94/

HWR/IOW

The pin function is switched as shown below according to the combination of

operating mode, bit HI12E in SYSCR2, and bit P94DDR.

Operating

mode

Mode 1,

modes 2 and 3

(EXPE = 1)

Modes 2, 3 (EXPE = 0)

HI12E

—

P94DDR

—

Pin function

HWR

output pin

P94

input pin

P94

output pin

IOW

input pin

P93/

RD/IOR

The pin function is switched as shown below according to the combination of

operating mode, bit HI12E in SYSCR2, and bit P93DDR.

Operating

mode

Mode 1,

modes 2 and 3

(EXPE = 1)

Modes 2, 3 (EXPE = 0)

HI12E

—

P93DDR

—

Pin function

RD output pin P93 input pin P93 output pin IOR input pin

P92/

IRQ0

P92DDR

Pin function

P92 input pin

P92 output pin

IRQ0 input pin

When bit IRQ0E in IER is set to 1, this pin is used as the

IRQ0 input pin.

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